Excavating machine



FIG. 1 is a side elevational view of an excavating machine showing my new design;

FIG. 2 is a side elevational view thereof of the opposite side of FIG. 1;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top plan view thereof; and

FIG. 6 is a top, front and side perspective view thereof.

The bottom of the excavating machine is unadorned. 

The ornamental design for an excavating machine, substantially as shown and described. 